Tread portion of a motorcycle tire



FIG. 1 is a front view of the tread portion of a motorcycle tire;

FIG. 2 is a perspective view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a fragmentary enlarged view showing the details of the tread portion; and,

FIG. 6 is an end view taken along line A-A in FIG. 1.

Broken lines in the drawing figures are intended to show environmental structure only, and form no part of the claimed design. 

The ornamental design for a tread portion of a motorcycle tire, as shown and described. 